Pyridine derivatives, agents containing same, and the use thereof as pesticides

Abstract

The compounds of the formula (I) ##STR1## in which A denotes N or N→0, R denotes a radical of the formula R 4 --CY 1 --NR 5 --CY 2 --NR 6 --, ##STR2## R 1 denotes halogen, alkyl, alkenyl, alkynyl, alkoxy, alkoxycarbonyl or alkylcarbonyl, where these radicals may be halogenated, nitro, cyano or carboxyl, R 2 denotes halogenated alkoxy, halogenated alkenyloxy or halogenated alkynloxy, R 3 denotes halogen, n denotes 0, 1 or 2, m denotes 0, 1, 2 or 3, and p denotes 0 or 1, and also the salts thereof, are advantageously suitable for combating noxious insects, acarides, nematodes or mollusks.

We claim: 
     
       1. A compound of formula I ##STR55## or an agriculturally acceptable salt thereof in which A is N or N→O, R is a radical of formula ##STR56## R 1 , in each case independently of one another, is halogen or is (C 1  -C 6 )-alkyl, (C 2  -C 6 )-alkenyl, (C 2  -C 6 )-alkynyl, (C 1  -C 6 )-alkoxy, (C 1  -C 6 )-alkoxycarbonyl or (C 1  -C 6  -alkyl)-carbonyl which are unsubstituted or mono- or polysubstituted by halogen, or is nitro, cyano or carboxyl,   R 2  is halogenated (C 1  -C 6 )-alkyl, halogenated (C 2  -C 6 )-alkenyl or halogenated (C 2  -C 6 )-alkynyl,   R 3 , in each case independently of one another, is halogen,   R 4  is phenyl which is unsubstituted or substituted by halogen, (C 1  -C 3 )-alkyl, (C 1  -C 3 )-alkoxy, halo(C 1  -C 3 )-alkyl or halo(C 1  -C 3 )-alkoxy,   R 5  is hydrogen, (C 1  -C 6 )-alkoxy, (C 1  -C 6 )-alkylthio, benzyl, halogenated (C 1  -C 6 )-alkoxy, halogenated (C 1  -C 6 )-alkylthio or halogenated benzyl,   R 6  is hydrogen or is (C 1  -C 6 )-alkyl, (C 1  -C 6 )-alkylthio or (C 1  -C 6 )-alkylsulfonyl which all are unhalogenated or is phenylthio or phenylsulfonyl which is substituted by (C 1  -C 6 )-alkyl, (C 1  -C 6 )-alkoxy, (C 1  -C 6 )-alkoxycarbonyl, halogenated (C 1  -C 6 )-alkyl, halogenated (C 1  -C 6 )-alkoxy, halogenated (C 1  -C 4 )-alkoxycarbonyl, halogen, nitro or cyano, or is phosphoryl or thiophosphoryl which are both substituted by two radicals selected from the group consisting of (C 1  -C 6 )-alkoxy, (C 1  -C 6 )-alkylthio, amino, (C 1  -C 6 )-alkylamino or di-(C 1  -C 6  -alkyl)-amino,   Y 1  and Y 2 , are the same or different and each is O or S,   n, in each case independently of one another, is 0, 1 or 2, and   m is 0, 1, 2 or 3.   
     
     
       2. A compound of formula I as claimed in claim 1, in which A is N,   R is a radical of formula ##STR57## R 1 , in each case independently of one another, is halogen, or is (C 1  -C 6 )-alkyl or (C 1  -C 6 )-alkoxycarbonyl which are unsubstituted or mono- or polysubstituted by halogen,   R 2  is halogenated (C 1  -C 6 )-alkyl, halogenated (C 2  -C 6 )-alkenyl or halogenated (C 2  -C 6 )-alkynyl,   R 3 , in each case independently of one another, is halogen,   R 4  is phenyl which is unsubstituted or substituted by halogen, (C 1  -C 3 )-alkyl, (C 1  -C 3 )-alkoxy, halo(C 1  -C 3 )-alkyl or halo(C 1  -C 3 )-alkoxy,   Y is O or S, n, in the case of the phenoxy radical, is 0 or 1 and, in the case of the R 3  radical, is 0, 1 or 2, and   m is 0, 1, 2 and 3.   
     
     
       3. A compound of formula I as claimed in claim 2, in which R 1  is halogen in the 2, 3 or 5 position of the phenoxy ring relative to the position of R, or halo-(C 1  -C 6 )-alkyl or (C 1  -C 3 )-alkoxycarbonyl, in each case in the 3 or 5 position of the phenoxy ring,   R 2  is halo(C 1  -C 3 )-alkoxy,   R 3  is F, Cl or Br, and   R 4  is phenyl which is substituted by halogen, and   A Y, n and m have the meanings specified in claim 2.   
     
     
       4. A compound as claimed in claim 3, in which R 4  is phenyl which is substituted by halogen in the 2 or 6 position. 
     
     
       5. The compound as claimed in claim 1 which is N-4-((3-chloro-5-1,1-difluoroethoxy-2-pyridyloxy)-3,5-dichlorophenol)-N'-2-fluorobenzoylurea. 
     
     
       6. Insecticidal, acaricidal, nematicidal and molluskicidal compositions which contain an effective amount of a compound of formula I as claimed in claim 1 and an inert carrier. 
     
     
       7. A process for combating noxious insects, acarides, nematodes and mollusks which comprises applying an effective amount of a compound of formula I as claimed in claim 1 to these pests or to plants infested by same.